Amend Worker Type that was loaded incorrectly

Summary

Need to change Worker Type from Pending Worker to Employee

Content

Hi, 

We have an issue where several employees were loaded into the system with a Worker Type of 'Pending Worker' instead of Employee and they cannot be converted to Employees via the Quick Convert option as they do not appear under the available employee options. 

Is there another way to convert them either via the UI or HDL? 

Thanks 

Joe